You will cope OP and the pup will be fine in the long run.
How old is she? If she's old enough to go for walks I assume she's 12 weeks plus?
If it makes you feel any better 2 years ago this oct we got a 6 month old whippet puppy. Desperately wanted by me. Talked DP around and picked her up.
Now, I had an ideal in my head over what she would be like. She would follow me around the house like a little shadow, behave immpecably at all times, never chew or break anything, come to the stables to do the ponies and curl up on an old rug whilst I pottered around. Even accompany me on hacks! As she was 6 months old we'd miss out all the toilet training, the chewing and howling at night.
The reality was vastly different lol. I spent 6 months trying to housetrain her, she chewed 6 pairs of flipflops, 4 pairs of slippers, a viv westwood wallet, numerous chargers and wires including the fridge one which tripped the electrics out one night, god only knows how many biro's and bits and pieces from my desk, 2 mobile phones (insured luckily) and a purse.
She had no recall whatsoever and it took forever to establish on the end of a long line. And the is a terrible theif where human food is concerned. She can't come to the stables with me as she chases the chickens. And would murder them if she got them.
She also has a fetish for DP's stoma bags and we have had one or 2 incidences where she has pinched a dead poo bag out the bin and gave it a damn good shaking to make sure it's really dead. Not sure whether that is worse than the fox poo to be honest.
She was hard work. And even today and yesterday she's in the bad books for rolling in some fox poo. Bleurgh.
But I adore her and have done the hardwork now so get (hopefully) about 15 years of the pure pleasure that comes from owning a well trained dog. Although the fox poo I could do without.
I work from home and she is my company during the day. She loves nothing more than curling up on the sofa with me, she loves a long walk and also comes on the school run twice a day. She is my DD's company when its too wet to go out much and the apple of my DP's eye. He dotes on her.
So yes it will be hard. And yes it may get worse before it gets better. But in the long run you will bond with her and if you do the work now, be rewarded with a companion who asks nothing from you except a walk, a full tummy and a cuddle every now and again.